Are the i7's quiet machines? Caressa has a long post where she says her i5 is very quiet. There was another i7 thread where the OP said the fans were loud, but I think he was doing encoding at the time (Caressa, want to give up fans speeds while encoding?) That's the only comment I saw on i7 noise. I thought the i5 and i7 had the same TDP. What the real world noise levels of the i7? Owners, please weigh in.